This vintage Midget Circular Slide Rule is a great addition to any collection of vintage tools. The slide rule comes with an instruction manual from 1936, an extra book from 1938 for the polyphase slide rule and is stored in a sleeve that measures approximately 4-1/2" x 4-3/4". The slide rule itself has a diameter of approximately 4-1/8" and weighs around 2 ounces in its sleeve.

This slide rule is a great piece for collectors or anyone interested in vintage tools. Its unique design and history make it a valuable addition to any collection. The slide rule is in good working condition and has no major flaws or damages.

Midget Circular Slide Rule 1936 + Instructions + Sleeve Vtg Tool +

Extra Book 1938. For polyphase slide rule #4053.